Paul drtjckmuller



J. P. LIPPS.

ADJUSTABLE SIEVE.

Pateted Peb. 1s, 1883 lllllLlIll N. PETERS Pima-UW. Walhngtml. I7A C.

(No Model.)

p i UNITED STATES PATENT OFFICE.

JOHAN P. LIPPS, OF DRESDEN, SAXONY, GERMANY.

ADJ USTAB LEjSl EVE.

SPECIFICATIONfOrming part of Letters 4:Patent No. 272,278, datedFebruary 13, 1883.

Application filed September 2, 1882,. (No model.) Y

To all 'whom it may concern: Be it known thatl, JOHANN PHILI'PP LrPPs ofDresden, Saxony, German Empire, engineer, have invented new and usefulImprovements in Adjustable Sieves, of which the following is aspecification.

My invention relates to cylindrical sieves provided with means foradjusting or varying the size of the slits or perforations thereof; andthe improvements consist in the particular construction and combinationof means for carrying out the adjustment while the sieve is inoperation.l

Figure l of the annexed sheet of drawings represents my improved sievein a sectional side elevation, the supporting-frame and all parts iixedthereto, except the plumber-blockf, being omitted, as they present n onovel features. Fig. 2 is an end view; Fig. 3, a plan ofa portion of thesieve with the adjusting devices. Figs. 4 and 5 are parts belonging tothe latter; Fig. 6, Fig. 63J and Fig. 6l show a portion ofthe'sifting-snrface in plan and in longitudinal and transverse section.Fig. 7, finally, is a section of the said surface with diferent relativeposition of parts. Figs. 5, 6, and 7 are drawn to alarger scale than theother Iigures.

The drum of the sieve consists of two cylinders, a and b, of sheetmetal, inserted one into the other and so fitted together that whilebeing in close reciprocal contact they may be shifted iu respect to eachother longitudinally. Both cylinders are provided in a like manner withholes forming, by preference, transverseV slits and registeringtogether. When the mov-- able one of these cylinders, which, accordingto the drawings, is the outer one, b, is so adjusted in respect totheother or inside cylinder that the holes of the former correspond withthose of the latter, as shown by Fig. 6, the entire width of the holeswill be free for the materials to pass through, Whereas when therelative position of the cylinders-is altered the bars or ysolidportions of one cylinder will more or lesscover the holes of the otherone, whereby the free width of the holes is reduced. (See Fig. 7.) rlheadjustment of the movable cylinder is effected by devices constructed asfollows-wiz., to the end of the cylinder b are xedby means of anangle-iron ring the arms vcylinders c b.

c o, converging in a boss, l, through which the end cof-the sieve-shaftpasses. e is a feather or stud engaging with a groove, e2, in the bossl, and serving to prevent the latter, with the armso and the cylinder b,from rotating on the shaft and on the cylinder a, respectively, whereasit allows these parts to be shifted in regard to each otherlongitudinally. On the end of shaft e is passed a sleeve, d, (shown to alarger scale in Fig. 5,) and which grasps with two claws into a grooveturned in the boss l, er which is coupled thereto in any other knownmanner and so as not to interfere with the rotationof the sieve. Thissleeve lies in a plumber-block, f, and serves as a bearing or bush forthe end of shaft e. -It is provided with a helical or oblique slot, g,Fig. 5, into which projects apin, h, screwed into the plumber-block f,and through which a hole may be drilled lengthwise, serving as alubricatingchannel. 0n the outer end of the sleeve el is fixed thehand-wheel i, having notches on its periphery, into which a pawl, k,catches. When this pawl is lifted and the hand-wheel i and sleeve d areturned the latter will be forced, by the engagement of the pin h withthe slot g, to screw itself forward or backward in the plumber-block f.This will cause the bossl and the arms c o to be moved lengthwise on theend eof the sieve-shaft, (which is prevented from being displaced bymeans of co1- lars on the journal at its other end,) and the cylinder bto be shifted in 'regard to the cylinder a. I It will be manifest thatthe shaft e turns in the sleeve d, and that the latter is capable ofbeing rotated to such an extent as will insure the proper adjustment orvariations of the holes in the cylinders a b. The object of the notchedVwheel t', mounted on the sleeved, and the pawl It', pivoted to theplumber-block f, is to hold the sleeve in a fixed position after it hasbeen turned to adjust the I claim as my invention- 1. In combinationwith the two perforated cylinders a and b, adjustably inserted one inthe other, the adjusting device consisting of the sleeve d, having thehelical or oblique slot g, and the plumber-block f, provided with thepin h, projecting into the slot g, the said sleeve being coupled to thecylinder b, substantially as and for the purpose set forth.

In testimony whereof I have signed my nome to this speoication in thepresence of' two sub- 2. The combination of the sleeve having theseribing witnesses.

notched hand-wheel z'. and helical slot g, and the plumber-block f7provided with the paivl k, and pin h, with the perforated cylinders aI), shaft e. arms and boss l, turning in the sleeve d, as and for thepurpose seb forth.

JOHANN PHILPP LIPPS.

